The key to successfully producing the best plastic parts lies in ensuring you have the correct equipment for the job. Selecting the right injection moulding machine can help produce high quality parts, keep costs down and make you more productive.

Choosing the right machine doesn’t have to be complex, in this two-part post we will look at six machine selection mistakes to avoid.

Purchasing used machines that function poorly

Purchasing used injection moulding machinery may save you money in the short term but if you select a machine that hasn’t been completely examined and checked before delivery you may find yourself dealing with costly breakdowns and downtime.

Choosing large screw diameters

Large screw diameters can cause quality problems due to material degradation. When small shot sizes are used with large screw diameters, the plastic material spends more time being heated by the barrel heaters compared to large shot sizes. Material degradation is more likely to occur if the shot size is small compared to the injections unit’s maximum shot capacity especially for heat sensitive materials.

Using all-purpose screws

All-purpose screws have their benefits. For one they can be utilised with most plastic materials like PE, PP, PET, Nylon, and PC which is good for moulding companies that mould a range of various materials. The flipside however, is that for a few materials component types and efficiency rates will be lesser compared to more superior injection casting screw designs like the barrier screw.

Lookout for part two of our post where we look at three more machine selection mistakes to avoid.

Plastic & Chemical Trading are renowned for their extensive knowledge in injection moulding. Their years of experience and international partnerships ensure that you get world class solutions you won’t find anywhere else in Southern Africa. Contact us for a solution today!

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